??? I guess no one knows. So I did a little snooping today and think I may have found it under the middle drawers below the bedroom closet. Kind of a ways from where they show it in the schematic
Need to do a little testing to confirm. Plan is to rewire to add the living room slide outlets (2) to the inverter. Also add an outlet in the slide to power the wireless subwoofer that goes with the soundbar I added under the mid TV. No heavy loads so the oem 1200 watt inverter (Magnum) should handle it with no issue.